Malicious PDF — malware analysis report

Static analysis result for SHA-256 681a200fe84d9994…

MALICIOUS

PDF

82.2 KB Created: 2020-11-13 05:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4e2aadea5792699374d92821405d9d8d SHA-1: d3ab266bd8032166a7f3a26ef9d27b746c6c866a SHA-256: 681a200fe84d999443cd740584674373de2e5416d3629b7c548c43ba2d0c7f69
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that points to a suspicious domain, likely intended to redirect the user to a phishing site or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'hunting horn progression guide'. No scripts were extracted, but the presence of an external URI and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/aws?utm_term=mhw+hunting+horn+progression+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467564/normal_5fad57ccb9709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_5fac5e1956f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421764/normal_5fa0fe4973c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_5fa86fcadf564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66a3d12-703b-4b26-b796-c66fc93ffcb0/1594260305.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/vanawelikodu.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/46982345081.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/saxotepaliborelebitufutas.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/adel_fingerprint_lock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f532a984-6308-4641-b1ac-f40c61ffdeec/44223980532.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/55124624340.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/inertia_and_mass_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/natures_menu_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/sinopijajozikudoguk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10368 5076 bytes
SHA-256: 35abbda368c769a1220112fa7b1d99fb54cde6bd7e4ff643e229a85c8c90068f
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 12112 bytes
SHA-256: a8248cd08fe119aa877827ee67bd05dae9077e711208d68cc54361f790084fc1

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